Abstract
In this study harmonic analysis is applied to the geomagnetic data of X, Y
and Z elements of IZN and SUA
observatories to investigate 24th solar cycle dependence around
Turkey. Dependence of solar and lunar amplitudes and phase angles obtained.
Amplitude variations of the first solar harmonic that its period is 24 solar
hours, and the second lunar harmonic that its origin is purely lunar, were
examined during the 24th solar cycle. As expected, amplitudes of the
solar harmonics showed more dependence than that of lunar harmonics. Without
doubt, it is not enough to search geomagnetic variations around Turkey using
two observatories. After the dense European observatories, there is a big gap
both in eastern and southern part of Turkey.
To fill these gap new geomagnetic observatories needs to be installed
around these regions. Thus, it provides important contribution to define the
geomagnetic field in both national and global scale.
References
- Bilge, A.H., Tulunay, Y.K., 1997. Spectral analysis of geomagnetic data from Kandilli Observatory, Istanbul, Ann. Geofis., XL(6), 1591–1598.
- Çelik, C., Tuncer, M.K., Tolak-Çiftci, E., Zobu, M., Oshiman, N., Tank, B., 2012. Solar and lunar geomagnetic variations in the northwest part of Turkey, Geophys. J. Int., 189, 391-399.
- Çelik, C., 2013. The solar Daily Geomagnetic variation and its dependence on sunspot number, J. Atmos. Solar-Terr. Phys., 104, 75-86.
- Çelik, C., 2014. The lunar daily geomagnetic variation and its dependence on sunspot number, J. Atmos. Solar-Terr. Phys., 119, 153-161.
- Çelik, C., 2018. Wolf ratios and the ionospheric L and S dynamo region, J. Atmos. Solar-Terr. Phys., 173, 23-27.
- Chapman, S., Bartels, J., 1940. Geomagnetism, Clarendon Press, Oxford, 2,159-270.
- Cueto, M., McKnight, D., Herraiz, M., 2003. Daily geomagnetic variations on the Iberian Peninsula, Geophys. J. Int., 152, 113-123.
- De Mayer, F., 2003. A modulation model for the solar and lunar daily geomagnetic variations, Earth Planets Space, 55, 405-418.
- Gürdal, M.A., 1997. Ankara Manyetik Rasathanesi, Harita Dergisi, Sayı 117, sayfa: 45-58, Harita Genel Komutanlığı, Ankara.
- Işıkara, A.M., 1970. The lunar tide in the E-layer above Istanbul, Pure and Applied Geophysics, V.81, Issue 1, pp 130-134.
- Işıkara, A.M., 1971. The solar and lunar influences on the Earth’s magnetic field at Istanbul, Revue de la Faculté des Sciences de l’Universite d’Istanbul, Ser. C, 36, 117-127.
- Leaton, B.R., Malin, S.R.C., Finch, H.F., 1962. The solar and luni-solar daily variation of geomagnetic field at Greenwich and Abinger, R. Obs. Bull. Lond., 63, 1916–1957.
- Malin, S.R.C., Chapman, S., 1970. The determination of lunar daily geophysical variations by the Chapman-Miller Method, Geophys. J. R. astr. Soc., 19, 15-35.
- Malin, S.R.C., 1973. Worldwide distribution of geomagnetic tides, Phil. Trans. R. Soc. Lond., A 274, 551-594.
- Malin, S.R.C., Schlapp, D.M., 1980. Geomagnetic lunar analysis by least-squares, Geophys. J. R. astr. Soc., 60, 409-418.
- Malin, S.R.C., Tuncer, M.K., Yazıcı-Çakın, O., 1996. Systematic analysis of magnetic observatory data-I. A proposed method, Geophys. J. Int., 126, 635-644.
- Torta, J.M., Curto, J.J. & Bencze, P., 1997. Behavior of the quiet day ionospheric current system in the European region, J. geophys. Res., 102, 2483–2494.
- Winch, D.E., 1981. Spherical harmonic analysis of geomagnetic tides, 1964-1965, Phil. Trans. R. Soc. Lond., A 303, 1-104.
Abstract
Bu çalışmada, 24. Güneş çevrimi
kapsamında Türkiye ve civarında yer alan IZN ve SUA manyetik gözlemevlerinden
elde edilen yermanyetik alanı X, Y ve Z
bileşenlerine harmonik analiz uygulanmıştır. Güneş ve Ay’ın etkilerine bağlı
olarak değişen solar ve lunar harmoniklerin genlik ve faz açıları elde
edilmiştir. Solar harmoniklerden periyodu 24 saat olan birinci harmonik ve
lunar harmoniklerden ise tamamen Ay’ın çekim etkisinden kaynaklanan ikinci
harmonik genlik değişimleri 24. Güneş çevrimi kapsamında incelenmiştir.
Beklendiği gibi, solar harmonikler Güneş çevriminden daha çok etkilerken, lunar
harmonikler ise daha az etkilenmiştir. Hiç şüphesiz sadece iki gözlemevi
Türkiye ve civarında yermanyetik alan değişimlerini incelemek için yeterli
değildir. Yoğun Avrupa manyetik gözlemevi ağından sonra Türkiye’nin hem
doğusuna hem de güneyine doğru büyük bir boşluk vardır. Bu boşluğu doldurmak
için bu bölgelere yeni manyetik gözlemevlerinin kurulmasına ihtiyaç vardır.
Böylece yermanyetik alanını hem ulusal hem de uluslararası ölçekte daha iyi
tanınmasına büyük katkı sağlanmış olacaktır.
References
- Bilge, A.H., Tulunay, Y.K., 1997. Spectral analysis of geomagnetic data from Kandilli Observatory, Istanbul, Ann. Geofis., XL(6), 1591–1598.
- Çelik, C., Tuncer, M.K., Tolak-Çiftci, E., Zobu, M., Oshiman, N., Tank, B., 2012. Solar and lunar geomagnetic variations in the northwest part of Turkey, Geophys. J. Int., 189, 391-399.
- Çelik, C., 2013. The solar Daily Geomagnetic variation and its dependence on sunspot number, J. Atmos. Solar-Terr. Phys., 104, 75-86.
- Çelik, C., 2014. The lunar daily geomagnetic variation and its dependence on sunspot number, J. Atmos. Solar-Terr. Phys., 119, 153-161.
- Çelik, C., 2018. Wolf ratios and the ionospheric L and S dynamo region, J. Atmos. Solar-Terr. Phys., 173, 23-27.
- Chapman, S., Bartels, J., 1940. Geomagnetism, Clarendon Press, Oxford, 2,159-270.
- Cueto, M., McKnight, D., Herraiz, M., 2003. Daily geomagnetic variations on the Iberian Peninsula, Geophys. J. Int., 152, 113-123.
- De Mayer, F., 2003. A modulation model for the solar and lunar daily geomagnetic variations, Earth Planets Space, 55, 405-418.
- Gürdal, M.A., 1997. Ankara Manyetik Rasathanesi, Harita Dergisi, Sayı 117, sayfa: 45-58, Harita Genel Komutanlığı, Ankara.
- Işıkara, A.M., 1970. The lunar tide in the E-layer above Istanbul, Pure and Applied Geophysics, V.81, Issue 1, pp 130-134.
- Işıkara, A.M., 1971. The solar and lunar influences on the Earth’s magnetic field at Istanbul, Revue de la Faculté des Sciences de l’Universite d’Istanbul, Ser. C, 36, 117-127.
- Leaton, B.R., Malin, S.R.C., Finch, H.F., 1962. The solar and luni-solar daily variation of geomagnetic field at Greenwich and Abinger, R. Obs. Bull. Lond., 63, 1916–1957.
- Malin, S.R.C., Chapman, S., 1970. The determination of lunar daily geophysical variations by the Chapman-Miller Method, Geophys. J. R. astr. Soc., 19, 15-35.
- Malin, S.R.C., 1973. Worldwide distribution of geomagnetic tides, Phil. Trans. R. Soc. Lond., A 274, 551-594.
- Malin, S.R.C., Schlapp, D.M., 1980. Geomagnetic lunar analysis by least-squares, Geophys. J. R. astr. Soc., 60, 409-418.
- Malin, S.R.C., Tuncer, M.K., Yazıcı-Çakın, O., 1996. Systematic analysis of magnetic observatory data-I. A proposed method, Geophys. J. Int., 126, 635-644.
- Torta, J.M., Curto, J.J. & Bencze, P., 1997. Behavior of the quiet day ionospheric current system in the European region, J. geophys. Res., 102, 2483–2494.
- Winch, D.E., 1981. Spherical harmonic analysis of geomagnetic tides, 1964-1965, Phil. Trans. R. Soc. Lond., A 303, 1-104.
Details
| Primary Language | Turkish |
|---|---|
| Subjects | Geological Sciences and Engineering (Other) |
| Journal Section | Araştırma Articlessi \ Research Articles |
| Authors | |
| Publication Date | December 19, 2019 |
| Submission Date | May 14, 2019 |
| Acceptance Date | July 3, 2019 |
| Published in Issue | Year 2019 Volume: 7 Issue: 4 |
